Speed is important from the point of view of the engines/rolling stock required: for a given amount of traffic, doubling the speed equates to halving the...
49407
blwloco
Oct 1, 2006 1:28 pm
I agree with the theoretical idea of a bigger boiler, but the realities are different and therein lays the compromise. On every railroad the load limits...
49408
Renaud (Ron) Olgiati
olgiatipy
Oct 1, 2006 1:28 pm
On Sunday 01 October 2006 09:38, my mailbox was graced by a missive ... These are two faces of the same thing: an increase of speed allows you to increase the...
49409
Stuart Kean
kean@...
Oct 1, 2006 1:29 pm
Hi Scott, Do you have any references concerning the effect of high "momentary" adhesion on the railhead? I would be very interested in this. The last reference...
49410
Herbert Garratt
herbgarratt
Oct 1, 2006 1:45 pm
Tony et Ronaldo, While speed certainly reduces capital cost dedicated to rolling stock/motive power, it greatly increases capital cost dedicated to civil...
49411
Herbert Garratt
herbgarratt
Oct 1, 2006 2:01 pm
G'day Baldy, OK! More steam! I don't think anyone would suggest that the Aleghenny's needed a bigger boiler. They were convincing enough as they were, in my...
49412
Dan Rowe
locodanrowe
Oct 2, 2006 1:46 am
Those guys did not check the reference they gave. The reference is "The Constructor" 1893 p. 235 Fig. 1026. This figure has a A and B ilustration as clearly...
49413
Herbert Garratt
herbgarratt
Oct 2, 2006 2:29 am
Dan, Well sleuthed, but even then, isn't the Stevo example (UK088?) displaying the expansion link assembled wrong way round: - concave side facing the cyls? ...
49414
Mick Duncan
kitbun2001
Oct 2, 2006 6:34 am
Gday All Ross,. Dispute. If you put a thicker liner in the cyls then the relative distances re piston rods and valve spindles will remain the same. Its the...
49415
Mick Duncan
kitbun2001
Oct 2, 2006 6:35 am
Gday All William, yes,you could do it that way as well,using new cyls. Cheers, Mick. 10b. Re: Re Transotion Steam Loco etc Posted by: "william wendt"...
49416
Mick Duncan
kitbun2001
Oct 2, 2006 6:37 am
Gday All John, No its not. A big boiler responds well to changing load. Its the front end that changes the draught combined with the steam consumption. A big...
49417
Mick Duncan
kitbun2001
Oct 2, 2006 8:21 am
Gday All Pete, Boiler wise, bigger is better. There is NO substitute for POWER !! Build up to the max axle load and loading gauge,but keep the proportions...
49418
Mick Duncan
kitbun2001
Oct 2, 2006 8:23 am
Gday All John, 525 RPM was about the same as "Mallard" A4 pacific and a BR 9F 2-10-0 when the got to 125 and 90 MPH respectivly. However they had shorter...
49419
Herbert Garratt
herbgarratt
Oct 2, 2006 12:33 pm
Ross, Fitting liners to cyls was routine practice, after a number of bores (3 or 4?), at which point, the cyl wall could no longer be reduced, with a further...
49420
davep@...
oddjob1947
Oct 2, 2006 1:33 pm
I've not seen the Trains article, so can't comment. There have been a variety of professional studies over the years towards electrification in US. ...
49421
Dan Rowe
locodanrowe
Oct 2, 2006 1:37 pm
Pete, Example 2 (UK088) is Gooch notice the extra pivot near the top valve guide bushing. Also notice that the bearing surface that rides in this bushing is...
49422
Herbert Garratt
herbgarratt
Oct 2, 2006 2:12 pm
Dan, As an astonishing coincidence, the day before seeing the extremely interesting Reuleaux triangle, I was mentally cogitating on the desmo valve gear of the...
49423
Herbert Garratt
herbgarratt
Oct 2, 2006 2:50 pm
Mick, Certainly a bigger boiler is no excuse for a badly proportioned/designed one, of course. But, providing the design is excellent, anything to reduce the...
49424
John Rhodes
chefrhodes81
Oct 2, 2006 2:56 pm
All, What about the 5AT? 74 inch drivers, 31.5 inch stroke, 112.5 mph, 511 rpm = 2683 ft/sec piston speed, 125 mph, 568 rpm = 2981 ft/sec piston speed. This I...
49425
phillips_rt
Oct 2, 2006 6:22 pm
... piston ... No, it isn't. When replacing a liner, the most difference in bore resulting (between the old, worn liner and the new one) will (ought to be) on...
49426
wholelephant
Oct 2, 2006 9:14 pm
Fond as my memories of the P&E are, actually those of pre-Amtrak passenger trains are just a tad fonder. I do not advocate restoring either because of fond...
49427
william wendt
wholelephant
Oct 2, 2006 9:29 pm
I forwarded this to the wrong group, with, of course, the disclaimer about being organized. Now that I think of it, however, there is a point about the Chicago...
49428
Stuart Kean
kean@...
Oct 3, 2006 1:51 am
What about if I could design a system that allows a boiler to be worked continuously for 8 hours steaming against one injector (with the other engaged from...
49429
Herbert Garratt
herbgarratt
Oct 3, 2006 2:50 am
Stuart! Superb! Can you make that 20" gauge, and then we can implement it in the standardisation of the Oz Railway Systems? Cheers, Oz Pete Stuart Kean...
49430
Russell Neil Brown
rssllbrown
Oct 3, 2006 3:17 am
... ft/sec piston ... and assuming carefull manufacture, assembly and maintenance of components. When the time comes, the 5AT will presumably be...
49431
Dan Rowe
locodanrowe
Oct 3, 2006 1:37 pm
Pete, I have been thinking about Stevo with a negative radius link. It would be posible to time the engine with the standard method of equalizing the lead in...
49432
davep@...
oddjob1947
Oct 3, 2006 1:48 pm
... I'd still be interested in comprisons of the 'pollutant' output from a steamer, traditional, or new, actual measured values. The usual lesser efficiency of...
49433
martynbane
Oct 3, 2006 2:32 pm
Then, Stuart, I think we'd be at Rio Turbio trying to stand up against the 100km/h headwind!...
49434
Herbert Garratt
herbgarratt
Oct 3, 2006 4:05 pm
Dan, Without a shadow of doubt, that Link on the Stevo model thinks it's in Oz....not the USA. It's upside down! Cheers, Oz Pete Dan Rowe...
49435
Herbert Garratt
herbgarratt
Oct 3, 2006 4:15 pm
... I'd still be interested in comprisons of the 'pollutant' output from a steamer, traditional, or new, actual measured values. AT LEAST, WITH THE EXCEPTION...
